Improvement of Anaerobic Digestion from Tapioca Starch Wastewater by Fungal Pretreatment
Keywords:
Tapioca starch wastewater, Fungal pretreatment, Biochemical methane potential (BMP)Abstract
In this paper, the improvement of anaerobic digestion from tapioca starch wastewater by fungal pretreatment at various HRT conditions was investigated. The tapioca starch from a factory was used for synthesis wastewater. The experimental set-up consisted of the Sequencing Batch Reactor (SBR) operated with 6-24 hrs of hydraulic retention time (HRT), and adjusted to the optimum pH of approximately 3.0±0.2. As the result, the optimal organic matter removal of 54% on this tapioca starch wastewater was found to be with the HRT of 24 hrs. In the biochemical methane potential (BMP) test, the HRT of 24 hrs also showed the highest COD removal efficiency of 60.6% amongst the pretreated systems. The fractional increase of the gas production in the anaerobic digestion with a fungal pretreatment was approximately 52.38% compared with the system without a fungal pretreatment.
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